given an integer a, find the smallest possible integer b(b>0) such that their bitwise logical AND is zero.
shame! shame! shame!
Remove the polynomials that have positive real elements of their roots.
Getting the absolute index from a matrix
How many trades represent all the profit?
Swap two numbers
Cat's paw - 01
Fault in our Stars - 01
Summing Rows and Columns
Sky full of stars - 02
Hanging cable - 01
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